1.. SPDX-License-Identifier: GPL-2.0 2 3Kernel driver gsc-hwmon 4======================= 5 6Supported chips: Gateworks GSC 7Datasheet: http://trac.gateworks.com/wiki/gsc 8Author: Tim Harvey <tharvey@gateworks.com> 9 10Description: 11------------ 12 13This driver supports hardware monitoring for the temperature sensor, 14various ADC's connected to the GSC, and optional FAN controller available 15on some boards. 16 17 18Voltage Monitoring 19------------------ 20 21The voltage inputs are scaled either internally or by the driver depending 22on the GSC version and firmware. The values returned by the driver do not need 23further scaling. The voltage input labels provide the voltage rail name: 24 25inX_input Measured voltage (mV). 26inX_label Name of voltage rail. 27 28 29Temperature Monitoring 30---------------------- 31 32Temperatures are measured with 12-bit or 10-bit resolution and are scaled 33either internally or by the driver depending on the GSC version and firmware. 34The values returned by the driver reflect millidegree Celcius: 35 36tempX_input Measured temperature. 37tempX_label Name of temperature input. 38 39 40PWM Output Control 41------------------ 42 43The GSC features 1 PWM output that operates in automatic mode where the 44PWM value will be scalled depending on 6 temperature boundaries. 45The tempeature boundaries are read-write and in millidegree Celcius and the 46read-only PWM values range from 0 (off) to 255 (full speed). 47Fan speed will be set to minimum (off) when the temperature sensor reads 48less than pwm1_auto_point1_temp and maximum when the temperature sensor 49equals or exceeds pwm1_auto_point6_temp. 50 51pwm1_auto_point[1-6]_pwm PWM value. 52pwm1_auto_point[1-6]_temp Temperature boundary. 53 54